Initial work on caching without calling dependencies

AS1024.GeoFeed/AS1024.GeoFeed.csproj

@@ -9,6 +9,11 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.0" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.19.5" />
   </ItemGroup>
 

AS1024.GeoFeed/GeoFeedBuilder/GeoFeedCacheService.cs

@@ -0,0 +1,63 @@
+using System.ComponentModel.DataAnnotations;
+using AS1024.GeoFeed.Models;
+using AS1024.GeoFeed.GeoFeedBuilder;
+using Microsoft.EntityFrameworkCore;
+using AS1024.GeoFeed.Interfaces;
+
+namespace AS1024.GeoFeed.GeoFeedCacheService
+{
+    public class GeoFeedCacheService : IHostedService
+    {
+        CancellationToken _cancellationToken;
+        private readonly ILogger<GeoFeedCacheService> logger;
+        private readonly IGeoFeedProvider feedProvider;
+
+        public GeoFeedCacheService(ILogger<GeoFeedCacheService> logger,
+        IGeoFeedProvider feedProvider)
+        {
+            this.logger = logger;
+            this.feedProvider = feedProvider;
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _ = StartPerioidicSync();
+            return Task.CompletedTask;
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            return Task.CompletedTask;
+        }
+
+        public async Task<bool> StartPerioidicSync(){
+            List<GeoFeedCacheEntry> geoFeedCacheEntry = [];
+            while (!_cancellationToken.IsCancellationRequested) {
+                await Task.Delay(TimeSpan.FromMinutes(30));
+                logger.LogInformation("Running on disk fallback cache process...");
+                var results = await feedProvider.GetGeoFeedData();
+
+                results.ForEach(x => {
+                    geoFeedCacheEntry.Add(new (){
+                        Prefix = x.Prefix,
+                        GeolocCity = x.GeolocCity,
+                        GeolocCountry = x.GeolocCountry,
+                        GeolocHasLocation = x.GeolocHasLocation,
+                        GeolocPostalCode = x.GeolocPostalCode,
+                        GeolocRegion = x.GeolocRegion
+                    });
+                });
+            }
+            return false;
+        }
+    }
+
+    public class GeoFeedCacheEntry : IPGeoFeed {
+        [Key]
+        public int Id { get; set; }
+    }
+
+    public class GeoFeedCacheDbContext : DbContext {
+        public virtual DbSet<GeoFeedCacheEntry> GeoFeedCacheEntries {get;set;}
+    }
+}